Flaxseed gel fail

I just started using flaxseed gel for my ultra fine, thin, high-porosity hair. The first time I tried it, it came out GREAT. The second two times not so much. This morning, I sprayed my dry hair with mist, applied the gel using praying hands (I used maybe about two quarter-sized gobs applied in sections) and then diffused. The gel cast didn't form at all and by the time I got to work my hair felt totally soft like there was no product in it at all. What did I do wrong?? Does the heat from diffusing somehow ruin the cast?